{
  "manageEntity": {
    "action": "Save",
    "entityId": "218175223",
    "entityType": "Track",
    "nonce": "0x93d40fa9395c1d6303c8ebeab9fd662ded9b04a57f816dc36f20b53191fb96f7",
    "signature": "0x5e9ae7bb9bb9325ee8aa42cd197f821fdd335af8437dc1b5c960deb208a4bdf41f04e958e1d6ff4b034b2064f50588411a6cc67ec9fcda110abd9347ca60b1801c",
    "signer": "0xDfAC0702040EaBd2d42e773014D4b014C0747D9c",
    "userId": "707937"
  }
}