{
  "manageEntity": {
    "action": "Save",
    "entityId": "1128706",
    "entityType": "Track",
    "nonce": "0x4c0d548999aef561cb66f7e3657b7cd9e30a5f16a14ade8a628555bf1731b354",
    "signature": "0x8de7455942b74d36b74d1562698e0be96057374b404377a1bbf22d119a53fee606e42ce01936050231bb7b7597b32f194b1e2957e3a9af7dba4e978ce674566a1c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}