{
  "manageEntity": {
    "action": "Save",
    "entityId": "1271300494",
    "entityType": "Track",
    "nonce": "0xbcd29053cd758713ddad46db09673470b703d0320021411bbd5e910cec233fad",
    "signature": "0xc450a3d5313b787fe84af3bef9ff38530455fbc61b0fd064004f479ba818362364cf00a8ab2059d39c58e8aae751e8d0229fe651b6006acb9174533212cee82d1b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}