{
  "manageEntity": {
    "action": "Save",
    "entityId": "1040926398",
    "entityType": "Track",
    "nonce": "0x4ef91222c1534bd32cebf5b5534a41fd08ec0198fccd4e8189fff8fac6e52814",
    "signature": "0xc5801c17eb5bee58f7f5c2b747469bd12e21aefc2977c1946287e062ffecb60d249d704864ad9cacc06d0deca3b2a650f4dd3294a9823830c25866bfc4db99ab1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}