{
  "manageEntity": {
    "action": "Save",
    "entityId": "561060219",
    "entityType": "Track",
    "nonce": "0x0bc87b3fbae0744d8111543c1c4daf633497f41bc85076593241120c8ddf7961",
    "signature": "0x8eb9966d41ae8ab2b5f3ae28dead959ff770eb4ba314127484fe95eb8b7be07c3c9be6a96ca88344ca7e3fdecfa73c621eef7dfdb3576182e5a452b274d119d81c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}