{
  "manageEntity": {
    "action": "Save",
    "entityId": "1950127502",
    "entityType": "Track",
    "nonce": "0x2a3e44d4bf90bdb5fa7db6580186a2adf0afa98e84f4eb52b481c83647c9b9b3",
    "signature": "0xefc3e2a654edeb94c58b2b667ff2e63cfad9af0be703f9fd2e678842ee02f183776b526c2082458264afdc72cbd82a62d68521d8eaacd768b139e474f4318e081b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}