{
  "manageEntity": {
    "action": "Save",
    "entityId": "700628944",
    "entityType": "Track",
    "nonce": "1793267096802788493",
    "signature": "0xeedf7a02efc307a9ee4ec5aa99e4087d2b82aeafdd072d639e6687433716a2d303a7f02701e1977360ead5f97dc58b3fe21e1eb1c255c84f449bd9201032dda91b",
    "signer": "0x9B241b1a6A99d662AE67D328e091Fc94faF23fdc",
    "userId": "881446128"
  }
}