{
  "manageEntity": {
    "action": "Save",
    "entityId": "220053",
    "entityType": "Track",
    "nonce": "0x41395aef2ece4acde2b8c0593bf5480d098dcc76ce6a59a0fbeaa3cf606de4b4",
    "signature": "0x1636b5ef20809658266e97c296229f772fcbb0386e57512d681ea1224c3fd66e1bd5bac5e20d53d2356ce8b42f08d0aa82eb44498e28202af0df60d7d245bbff1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}