{
  "manageEntity": {
    "action": "Save",
    "entityId": "1569480900",
    "entityType": "Track",
    "nonce": "0xe481a4fb010d5fa82d91824d15578f64c5041d17adbb86beb41e165e75dd2b97",
    "signature": "0xc1349c9fda395f277649d0cffbec0472cb399acbc43a86e38b13d52c3000fe094c679a5f5fbf62d1f954a096d43f3550d8f8993e467ff7f2f5ab7e4b5df012691b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}