{
  "manageEntity": {
    "action": "Save",
    "entityId": "2004077067",
    "entityType": "Track",
    "nonce": "0xbec1d74071c3dcff801dfad2da4ecacabc8654148700a65d0892f7cacc6c4d6d",
    "signature": "0x161200163085e51db674dbe3697f96ce0162d4f4619e2fdc0270261e02dbb38f3e09705138472409fa690f67e775a764bbd62a9246e90e05b26f2d25abcdb3801c",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}