{
  "manageEntity": {
    "action": "Save",
    "entityId": "800190",
    "entityType": "Track",
    "nonce": "0x1d8722dc10501d148fb123b729c31865367fc496388508f4288c71dc536ef7cb",
    "signature": "0xbdaedd2452d45e3c614e1342c52603d1988878e099e56b79940e3b20ad3aaaf37ddc3c10877b02f4851a4d25ef46360ad577ddd25dc9a079f12c2ce03b7d13081c",
    "signer": "0x98B3f06eAEa080E8d8b1C86F1c9FD36Eb33dEd5D",
    "userId": "615702798"
  }
}