{
  "manageEntity": {
    "action": "Save",
    "entityId": "893840661",
    "entityType": "Track",
    "nonce": "0xea06cdf8eac22f8d7379b86c3ced226c59b968bc40907f0ed48d720d5b5eaa16",
    "signature": "0x747afcf7041c668456d17d9a469efb7b77dd34cf0ad1b74cd2acb7ff64e877943bf4c5a9591cacc14bd56e895082cc2d20b08d92f0652c3abe0f98e6d40a83271b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}