{
  "manageEntity": {
    "action": "Save",
    "entityId": "435773288",
    "entityType": "Track",
    "nonce": "0xd5e105a175f0ec5c7bffd899d5fb903332c98d9095e6cc241dc47b85c6983d43",
    "signature": "0xa31aacdcda29fefab19a47d14dff3deedec0b4a6600d9fc4dd2025eb2c5547bb6827a09c79b3d791663141544d1ff4e4ac018a1b8f6d8b722dbdc9fbb4574a441b",
    "signer": "0x06F989586c5477333A41f6057f224Df79903862a",
    "userId": "24240642"
  }
}