{
  "manageEntity": {
    "action": "Save",
    "entityId": "1230704907",
    "entityType": "Track",
    "nonce": "0xeac3bf5ca274f4919bcfefec851ac709098829eedb277e91f7811b8d91bf3191",
    "signature": "0xb3a04b0306e8b7dce667fe7a58319a5361b6541f87e0c9149cfc927f853c18bb402942750d600cd0316ce6d99ca1f1582b89c8da6a3eef13b2ee44c18b9f06c21b",
    "signer": "0x48a006fC89FEf065AAB7A5769519625870833CC6",
    "userId": "128172"
  }
}