{
  "manageEntity": {
    "action": "Save",
    "entityId": "205254959",
    "entityType": "Track",
    "nonce": "0x2c69eb392930495c7b003680f8a381daf2c71af7be91653f8c0a1a4fa6a82876",
    "signature": "0x6c67e480a0745567dd9ff7744a5fa6a8c840e8fa9b0b1320657051d00666e4ae61cb6d3a62b622b353637369ea940ef45d5ea12b7ee5274134cce1ab1e3dcf051b",
    "signer": "0xc03cf24b1C519dA6a18B6509c7F5C57d01620755",
    "userId": "870665506"
  }
}