{
  "manageEntity": {
    "action": "Save",
    "entityId": "367215072",
    "entityType": "Track",
    "nonce": "0x6d04873d2955cdb82a062d55ebc1fb03e73f6016f4e1f67f7eebef1c39ffac5f",
    "signature": "0xe36cfe45c429651342eef1b26feefd76190e2223dd51346911934d6adb3812850a2358ad8b56f8269ff9eaf831b6d91a3e13fbb5da25eb5024d2bb479b4b5bc01b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}