{
  "manageEntity": {
    "action": "Save",
    "entityId": "107115777",
    "entityType": "Track",
    "nonce": "0x76ace990130a059ef03e1bd95e45614bd577ea8d0e408c0c753611f894bf38ed",
    "signature": "0x956998a5af08523f4468bc15583a31f0643c30e0721d2f1cde043519fe8b78e25857c4e1a63b8c7d948b96b01e0c20ddfec1bed1669bfec95cf5acf7ed97457f1c",
    "signer": "0x5D012C880480A2E1ab4345f6F374CFf73e040331",
    "userId": "10449019"
  }
}