{
  "manageEntity": {
    "action": "Save",
    "entityId": "776879266",
    "entityType": "Track",
    "nonce": "0x0c8b7ed6e16a45966ff233f26190216674843d6900561fefda9bbdb08e44337d",
    "signature": "0x60e3c1fc15018c68116173cfb16efd3c9fae5280c4fc83e32c52b329c4b1594a6ac412c5eb5bb5338a1a54790cb41fd25c6ea7493aef35ba4f70014b0ca921341c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}