{
  "manageEntity": {
    "action": "Save",
    "entityId": "117815936",
    "entityType": "Track",
    "nonce": "0x8f11cc97f4f1358bedd539e1fcd8d42b5f8b0d5ed1f0df5e7a74fcbb0fcf276a",
    "signature": "0x03614a3f2e741f7da54f7477a3a5bde9df71c63da945c675d8c98a328f18a7c936a212cb2900c57db4b0bdbe5170ccd103eb1813b995436784f79a669439710d1b",
    "signer": "0xD9254B079e0e1571E56512C57188F2eec899054f",
    "userId": "854498636"
  }
}