{
  "manageEntity": {
    "action": "Save",
    "entityId": "1082172679",
    "entityType": "Track",
    "nonce": "1793004886434105289",
    "signature": "0x16b61a0b7e33c1ceea26ede6668ff0263749cdf1670f49434d60fd0f1eb4656e7cca8cfbd9f757a271d8ecd8aa3df7cc09c91f5096726951e5ad2d28757230641c",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}