{
  "manageEntity": {
    "action": "Save",
    "entityId": "163429",
    "entityType": "Track",
    "nonce": "0xa45d92bd63da2dbfaf01651e4bec9c3924ae48cc5120e48a5f59b77ad5e7d155",
    "signature": "0x80f345f79a45b3765f38c1e21ec98e602ce3b818784de7818b1f18ba811ef74e76ce17c2b6bfbb5e1207002c0a77f05139a9697daf803ec58bc984f2897512fb1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}