{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x716abacb8c22606669d91039eb6295761fe03321265536f3a76a3daa7d5159f2",
    "signature": "0xf3ddd4a53dfe74abd3cb33451b5dff3a7fb3b96abfe7aeb6a03bfa47947d8b7a6a0bd9c710e36236f3263bd52a2c56eba0cd3d68e3f435f4df493042e1e783491b",
    "signer": "0x14f59FcC45099C848a8D9bD28E8b0a11a669Ea45",
    "userId": "793206989"
  }
}