{
  "manageEntity": {
    "action": "Save",
    "entityId": "1984715771",
    "entityType": "Track",
    "nonce": "0x892ec0ecacbf528a80affe60b28cdfcbb93e7833004c4bd291c062a20d1f4233",
    "signature": "0x7cf033d453029f8b8489b360c37e7fd9b1a6a1a54ed766650507389c0d46380f1c4b57008dbdcc966b1c0950ebaaa613a1680353126391d88a10a9568f3f57991c",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}