{
  "manageEntity": {
    "action": "Save",
    "entityId": "624534587",
    "entityType": "Track",
    "nonce": "0xcf648600a812b4cd824e88e12743c742142b07cb3aa2d9451afb6faefbf4d22a",
    "signature": "0xa87ff2ce19207707bf9cb179adbe114f7b286b42df983b16a5f34cd926947c3934fe7b3cfdf0cc15ef8c3dd1df4a7619018807170f182fb58c0c83eebc1fdd651c",
    "signer": "0x48997477d821e30d3Fa835d1Ee7809B3253Cb100",
    "userId": "75085"
  }
}