{
  "manageEntity": {
    "action": "Save",
    "entityId": "1015984",
    "entityType": "Track",
    "nonce": "0x60a8739fadcca61f8651a9a86e66db34e1761a18b39ccadf91d8c921772b6c05",
    "signature": "0x1e51f48c39e066378ff8a4eb5c4673860ac01660a92f56cabacb52e681f5154e27332545bea6ec6613465a29670b74c84b341ff86e654f2532ca133ac789006d1b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}