{
  "manageEntity": {
    "action": "Save",
    "entityId": "2131844155",
    "entityType": "Track",
    "nonce": "0xd2cac3b3b6f391941d519fa512c8999c56815e826aff5148339dc932f9cab6c5",
    "signature": "0x7adb3a45aa93ffc7a2bf5ece683e99e717e88fea94b58109a3b6b53cdc54989105332e9a53bddf6c52cad9eec0b532c6acb0a5b96af01b5214bd12ef231cd8401b",
    "signer": "0x6802Fe39C5FA9f99ac1Aa32F164982185A3E70ea",
    "userId": "152482938"
  }
}