{
  "manageEntity": {
    "action": "Save",
    "entityId": "561357702",
    "entityType": "Track",
    "nonce": "0x6d3941ca2f22ed434c0e4a2d061f842edb16b0ea5812f3370e2f1b5385106bd2",
    "signature": "0x6e1ba856a7753a0853139c06c505cec29af69d5d13dd69071d83aabc673b58802535221b619c7b627fcafe2d0e1c510a76ef9e78b514de237f7cce3afc534bce1b",
    "signer": "0x1fc5D9D4B88B8D8c7d91F317c38d82Acac11B6E6",
    "userId": "38437"
  }
}