{
  "manageEntity": {
    "action": "Save",
    "entityId": "147993720",
    "entityType": "Track",
    "nonce": "0xa95ed64ffd8104e70253a5ce87160ebb99227352ba9c5409ad6d129c251b5255",
    "signature": "0xd02994bf7adad60b05920eefc04c7cc9f1d6bcb24eadbbc6920202be90ab2e34033c9c1cc7e54eccbe787653ddc77ef448a1143a6a8fd6fe4fe033572a860fe21c",
    "signer": "0x9681BC77156FF79A657180CFE1F91Dec126E9c4d",
    "userId": "61556012"
  }
}