{
  "manageEntity": {
    "action": "Save",
    "entityId": "164904024",
    "entityType": "Track",
    "nonce": "0xb5508d70acf806c585150c93849b79f72f267e718ce7a0298e84138610ebe9d6",
    "signature": "0xac2c70903056a5747861a77dfae5494114529d8afaca55e6d326cd7664a6e40158a515eecf5875a60d177110b90cdad0f007e6c04ac27671229220c11eb1a5da1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}