{
  "manageEntity": {
    "action": "Save",
    "entityId": "537788810",
    "entityType": "Track",
    "nonce": "0xbb480f865b666d0288412ced6c9a56b5c4bca27a6e3828e9e6e0dc10855a85f1",
    "signature": "0x0ff3a02374d2b65928e85e5e1039181f8f84650242148f50b56ea1e5c1afe86a755721e5b835a3a240fb9b911b22b95e6313249918c280bdec7a8e803fde74791b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}