{
  "manageEntity": {
    "action": "Save",
    "entityId": "452657",
    "entityType": "Track",
    "nonce": "0x23f0866ffaa59b29f1d2847d64baf5a2af64540dbb29a6e0a3a6d19742e51308",
    "signature": "0x3c05e45d253783798d314e47beecf410c32920e662c992d02201c154c22bb2ae4e2f23f0b3d534b0ab342922f0b48de6d77c3dc6650289e8f6b470e2cc7f8e6b1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}