{
  "manageEntity": {
    "action": "Save",
    "entityId": "435206",
    "entityType": "Track",
    "nonce": "0x7eb6290746a6ef0081cffde1bbefe1e519b74788b8a5a845ad0e1ea046c3e2cd",
    "signature": "0x9cf098ac85d6353da3d1065c763532439a2b5755b0ef3bbbaa4ed0b10eb1e513022a319aafebbd15423f6b3de6cf528b5ee47990f59962e977ee9da16bad477c1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}