{
  "manageEntity": {
    "action": "Save",
    "entityId": "281669017",
    "entityType": "Track",
    "nonce": "0x3e7065bdd8822bcdc06089c4ee483075e6647f68322fbd412b4407e27f790005",
    "signature": "0x3f3ff1c553aaed745e4296abd0c6bbd86aa0c7f41b7cf07ce4b8e949385a056d6c93fe591c23261c9e33794c330b7401402b8f9c28fa998bf4484fa93bc32a091b",
    "signer": "0x94e0dDC50579175818AaCFBC9aba8B065fEf2a55",
    "userId": "460147282"
  }
}