{
  "manageEntity": {
    "action": "Save",
    "entityId": "1757866287",
    "entityType": "Track",
    "nonce": "0xd0ea5fae2e3dbeaa2372fbc80fb42b5d8ed4e2e46beceff33576ef7be2418699",
    "signature": "0xe4d9d0f8f9c0101feef47035f948c463e29492baa7d618073f4d96ececf88ace16ec35b59b735cd6f5815096f4d91b4e1083eef1290b9d12639e152652b069301b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}