{
  "manageEntity": {
    "action": "Save",
    "entityId": "318697544",
    "entityType": "Track",
    "nonce": "0xe51919d249b88cc8b0b21e08c82fb1f32a28a245c6b8daa670f2394509dab716",
    "signature": "0xa810afcdae11d71e2c92363305391135364d47184796dba8697744715c221afc1aa60be661c15cb65e98b65911139493410eeaec8bf519f3a61d0bdffcb6daba1c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}