{
  "manageEntity": {
    "action": "Save",
    "entityId": "130625",
    "entityType": "Track",
    "nonce": "0xf9dc6e66f454c8ae05451945b68045ace70478aac24d6dd26b955482c5c0fc70",
    "signature": "0xb8cd9375c68c7665408715b98fefba567d4c7550a14e837ccc17806bdd66cbf015f5069336e342c8055249478a85e3a0fe830b678e3d766ee0759313209320821b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}