{
  "manageEntity": {
    "action": "Save",
    "entityId": "220027820",
    "entityType": "Track",
    "nonce": "0x078968be091fdebfc523f727197de79138507ce4b399e705a165dbedb30a378d",
    "signature": "0xd47d72de341a5beae38fda2feb8dd3740e7e8375204ec9a052edb0e2bc332c9d2ed10cf52cf03a0e1b5b294917b3818fbdcf88f50b34c7e16bbff934e52f5a371b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}