{
  "manageEntity": {
    "action": "Save",
    "entityId": "2072646134",
    "entityType": "Track",
    "nonce": "0x7931db9b1f0b6c7ed403267b90b955206212591837d9acc9e552a95bf4ad05db",
    "signature": "0x243295b67c40292359026a9a8b4300a93b3530465d8b6983ab44c15f357a855f3ceed3917f6478777d7e21a6082c226d0c513aa27eb52e4c13d86d06666a2cc21c",
    "signer": "0x44Fe9338D9d1405927C73FDA0be0F36ae481Cd39",
    "userId": "983568397"
  }
}