{
  "manageEntity": {
    "action": "Save",
    "entityId": "73706156",
    "entityType": "Track",
    "nonce": "0xe3bac9b36175d4a11661705c66aa38944f686c5143430d87231eaf1fb92be751",
    "signature": "0x56aeac3fae267151a8104cabbcb32d7d0822d6a2286af50a278490fb26741143125b6e4f9d10708173bd5d8483628c46d66a96fc89308bc0eb0d3b329c881e7f1b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}