{
  "manageEntity": {
    "action": "Save",
    "entityId": "282484",
    "entityType": "Track",
    "nonce": "0x5a4e0e7afbaf1d1dd87985eb26c75a9b417aeaad8d52561dabb34229f9d0310f",
    "signature": "0x2d8af7cb1cce6bcc4cf0b0921d9fb9bc023eafc233e5d1c8c77c2f58f23c2b7a55f5a78ec447ac7169dd4d950acf7f046a7ae7d016ef7d8c71ab8abadf66f8ab1b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}