{
  "manageEntity": {
    "action": "Save",
    "entityId": "255075602",
    "entityType": "Track",
    "nonce": "0x3d14094aabe04a23762ea1b0070584c50152b979f1c3ba7b69616749f048e9bd",
    "signature": "0x52356ecec7050afead062a1306193b39bd11e80e367992e38ce6acc09df5d29a38d8cd072735b755c7ac9062fae88bcbb8a7140a8059f5e55f43128af0307fcb1c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}