{
  "manageEntity": {
    "action": "Save",
    "entityId": "1291981147",
    "entityType": "Track",
    "nonce": "0x120a0d0abacf1e983301d8ad8d177ef1c7ab8bae1d4054ee7c7ff9bc995b5d5a",
    "signature": "0xbd845811ba7cc47929a60d6d8c4621ec6817e947d2f087b7085ace91ef37737243ea3cfda10648f2923496400bb2c45d0421037e0632b3ab434ab2c26e6f37ad1b",
    "signer": "0xa85dce385eaA369F6073e0b6e242561d0870425C",
    "userId": "308558165"
  }
}