{
  "manageEntity": {
    "action": "Save",
    "entityId": "828821629",
    "entityType": "Track",
    "nonce": "0xda8432d562859004697216df6c21dbc64c9bdd8fd5a5bfd81cdda5d69f27da70",
    "signature": "0xabf28a51570b4d0808192c1dcd7cc2a49225121e480247906c528fb7814448d22ca74e9f947c375587a01ad581cc133dd870c306f7dd9a698af99f11795b1b531c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}