{
  "manageEntity": {
    "action": "Save",
    "entityId": "1949689450",
    "entityType": "Track",
    "nonce": "0x69e29fc0da2085ad2f34639aa2d925524edfd9053cbd804ec9db945a04244bb3",
    "signature": "0x097e7ba4574c5efb1710635950f6f8d7a8713cab8081ad410f20775b4bfead2f1a2e8a086a1897dd60bc5b81b6823d261984dc9e990a1e4d1db5a7486e2e2b691c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}