{
  "manageEntity": {
    "action": "Save",
    "entityId": "1000239",
    "entityType": "Track",
    "nonce": "0x47d908b8917fd6e5a4b700666e254897e5eeb1e028917d1d31c930b01fc5833c",
    "signature": "0xe8b95dd266f4947883724352805e5cf2c477aa72f5ca3e5b7d8c7311061c6457337eaca7622782d1cc9eb99017baff8dbc1d194ed0b0f4e3032a45d1d05ef69b1b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}