{
  "manageEntity": {
    "action": "Save",
    "entityId": "2111115928",
    "entityType": "Track",
    "nonce": "0x3df858ffd044b8393ad34c0e1f4b8aa95f85a7f4eb029fc3d4374d45c0c3b070",
    "signature": "0xe57a65296ab703e3f542b61f2b490bda7121444c9e11f96cbdcc89f365804b983dc90147e3c8870ee7db8c07170745c5f037f8aa694f63b1a28d10aba4280de61b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}