{
  "manageEntity": {
    "action": "Save",
    "entityId": "205468950",
    "entityType": "Track",
    "nonce": "0x48b237f7fd03a89ec316466fc67f90872a8bcbdc8507a5ab83d1ed2fd42c944b",
    "signature": "0x57cd79636adf8530c71649ab4331234b3381249c6027df74126c02acb68ccff341b2122755bf21dc698e125a99b72b257a4b56903a1c17c795ef13f0313d7e771b",
    "signer": "0x4A5dE2f24350e587e5E234d29667fE6958371c67",
    "userId": "130081761"
  }
}