{
  "manageEntity": {
    "action": "Save",
    "entityId": "1511370223",
    "entityType": "Track",
    "nonce": "0x27307326fb8c5e230ca38adb1e7b4d0ef8edcbf146bb598fd6ebba36580c995c",
    "signature": "0x231542b0413888e976eb29046f387128582ab309a569e9ce54ade6e71dd9e5105837ccc0acb648b2b1c0ee3711b9cfe0081306d1a7a87f0ac597bfdd2fb7a2a01b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}