{
  "manageEntity": {
    "action": "Save",
    "entityId": "622612591",
    "entityType": "Track",
    "nonce": "0x382585848ef93512c733e948186b6d69dfc1bc0d47039e671e6d621c8afe1875",
    "signature": "0x4dc19955c698668e9108d0151eba29f5f24fa540bf4731e1d05b179ba62ff9035ebd77a214379db3b770d77a6cff8e440c83695b5591d7c444c392a97fe7c6a21c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}