{
  "manageEntity": {
    "action": "Save",
    "entityId": "1113556",
    "entityType": "Track",
    "nonce": "0xa7a87786bda382c7ec8b67606ac85511a89673c7f865b08ac01de94412fa8102",
    "signature": "0xc2825d681d6fba587b904bfd3b832d29a38112cfa4ecb6e0524ed3a57d18d57f473fe49152e7b8fc244a675aa2b8435b7b4e0b5a945d12c3e07f70bc9e68a15c1c",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}