{
  "manageEntity": {
    "action": "Save",
    "entityId": "324111",
    "entityType": "Track",
    "nonce": "0xb0504c4e093906862da28188801bbaa47b06fa296d164191ef1ce610faba3132",
    "signature": "0x8314d8d429b350eb6dfd5196f4bf9bc6b509d1c96cad34ac0b85d7a143a3b0c463df3f4e759cc6302de01341a0214eeef5153f13d1a967647076e6e9beb28eea1c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}