{
  "manageEntity": {
    "action": "Save",
    "entityId": "1629831742",
    "entityType": "Track",
    "nonce": "0x85a2dbecd0a5e41cf0acd45dc2358aa9438ad91051a75cfe4d7564f36a4adf60",
    "signature": "0x9726163fa45598854a3e207cb0d4ec5853fcd321aaaec61f8abfa9eaa74abb4f10c3cc8e89f2494c04e270cfa9128d0faf795eb05cd59cce2cb19372a0f8ee2b1b",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}