{
  "manageEntity": {
    "action": "Save",
    "entityId": "1599588252",
    "entityType": "Track",
    "nonce": "0x2bd3e7685a579dd8d1438bcaea53fd390833d9631077887c3dbcace5a8f15b21",
    "signature": "0xd8f9dec11b374669b6d673293ad85aa47c2cf652ca2ba6d481b01254a5568968454821eb252c203451fa4668892b4d2c26ef7993778acb999f152ce5f42fa8801b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}