{
  "manageEntity": {
    "action": "Save",
    "entityId": "963853101",
    "entityType": "Track",
    "nonce": "0x1a33a548f91381f2ebd0aeb07b67401c22fd68242a65e90ec23f4cc8910f7966",
    "signature": "0xe8e51971132722b8c816e5d1f613857e870ab1986a7a6cf41782018184e4627651aa76a5ef238ffdef0dc508bfcdd6faf404198764d42ad108c28a20a2b163991c",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}