{
  "manageEntity": {
    "action": "Save",
    "entityId": "568445316",
    "entityType": "Track",
    "nonce": "0x3347b76dbf012bbf6e93f3554bc21138b4c26da743c8a9bcde1195b17f8502d1",
    "signature": "0x05cbc33342b4ac1747342e088e6510f36f5546825e1e05e7b4bc7e13cb6bf5820b533efd18e83aa23549920b664e0e023522d54ea913ddd9a30e129709f731b21c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}