{
  "manageEntity": {
    "action": "Save",
    "entityId": "1192044918",
    "entityType": "Track",
    "nonce": "0xb228a24ac0d761bbd0d33f3b31e07703e9f99c363560c87bfe53247401c60cbb",
    "signature": "0x00193c422edf47efd4038d1fa4f87b7a4e1b7f19b840d9e40a3f87fc34fbd8df64f85acf8604e663137723eecf3b49dbe13e3e70ef2ab049bd1d26382812f10f1b",
    "signer": "0x204E506f1D5498d2CABD41d2fc7a3078d5792835",
    "userId": "768479471"
  }
}