{
  "manageEntity": {
    "action": "Save",
    "entityId": "1259520892",
    "entityType": "Track",
    "nonce": "0xd14fc756af0bcb6ec2d64d410e34d438cd505c89f24f0a8a7d6f351453774c69",
    "signature": "0x71c261ba9a7ed89abf42b635534d70d854302fa9a7f1d67cb06e45792cc619df7c0eb5cd471b4ea7460e5741db098470526c87fc91a642a89d1f91a8868235fd1c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}