{
  "manageEntity": {
    "action": "Save",
    "entityId": "438237313",
    "entityType": "Track",
    "nonce": "0x9e4540fb7f4ef0eef83fb44aef0aa3eb2df37d5832877295a6aa0ff0043ae58e",
    "signature": "0x5fa0d10aa7ad981c927e8fdf789c83931e85f166f515555eeec2ca9c5c02c09403cb27f8efc4cb3df7f2ff32a572a898264ec4851c524d1b2a3ce739462df26f1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}