{
  "manageEntity": {
    "action": "Save",
    "entityId": "29886",
    "entityType": "Track",
    "nonce": "0xe6336ea87663d228f955e8d43aaf2676ba010e746d0dfe9025d4f258d160f992",
    "signature": "0xc365e2632095e43135e6be14cee0d7970c46cafa5d08ed0b63ee4ee4d716dc652ec0e7bee87ec56f7e0b8287299d11616c784b728fab361a79a5ebc0f7ec373a1c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}