{
  "manageEntity": {
    "action": "Save",
    "entityId": "594796030",
    "entityType": "Track",
    "nonce": "0x5dc0569023adb3e8b89a6070c90c0e9575897389d92c0e08f4a518f6209ae478",
    "signature": "0x723ace754796de9612ee83381d242b3a8ebb1f5fa85978eb08b9dd0c4001c27e7e11bd280d72e30778377f9e327c05dcc3357e0f18fe5e76f715fa4d6f2b4b101b",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}