{
  "manageEntity": {
    "action": "Save",
    "entityId": "821838933",
    "entityType": "Track",
    "nonce": "0xaf0ad9bbc5715d61e0701a86ec940da195b25f1a0377db936e64f235af32d855",
    "signature": "0x6e4de2f343bb886e5d16e91626c41f316c71bf9372f26212d276d36e1f0c6e251c154e35910ed81609c9b2199a0c028c69f26546f07c195a08abe8f2fdbfe5d21c",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}