{
  "manageEntity": {
    "action": "Save",
    "entityId": "117780",
    "entityType": "Track",
    "nonce": "0x45f03082ec3b11c8685bb3355cb7adc318ea4f370ab962916acb6bf9d8615dc5",
    "signature": "0x35bf3d819cae5fb8d0c6b59726752cd5f3d588dc429271b0c19eed19f02f08a32cb7ee7e8cd418943cbf2b1ad57755da280e549f4cb6d22aca49ee8bc2afe1a41b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}