{
  "manageEntity": {
    "action": "Save",
    "entityId": "702311791",
    "entityType": "Track",
    "nonce": "0xa9718ca32f34f0c18ab4b68a8875921dcd698e4fb2e625a980e0984367d79dd9",
    "signature": "0xca779df43e33b1acf4b49c945eaf99a13eca7cf965392c5c3e15ef9dfd832be7213b5a6a27f096ceadc07d179070feb3f401c0fd57c7bfb0540ac570a84ae1931b",
    "signer": "0x34F50BD1d16FaA0390f6037c86b7D52Ff6629a25",
    "userId": "739630124"
  }
}