{
  "manageEntity": {
    "action": "Save",
    "entityId": "541794",
    "entityType": "Track",
    "nonce": "0xed1c67cc1bb4a7f7ec1f35a6dd6ee7901b7ea5ea5aef5b2e3b059f01de4fc65f",
    "signature": "0xc73816576a63964df0acc29369fe4cd2869823402b6fbd093623dc2e85f7035c46065dbcb4f755187800a4b34f1baee04fe64349c46b96052419d8ef3babdecf1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}