{
  "manageEntity": {
    "action": "Save",
    "entityId": "1386003773",
    "entityType": "Track",
    "nonce": "0xd55d5fef5088514065c83ded7b7fbfaee487f0ad87d5e608fc54446f613d61b6",
    "signature": "0x80196396e6144e81dd4d306c86e89513e77f7694b85d48b2c8ac6291e130f4370f0237375cc40fffe699578e4fa9eca9fd389f679b94b86698c056b8285828491b",
    "signer": "0x0246262E4959323EAC2FBf603C6D24352d57Fc51",
    "userId": "700531000"
  }
}