{
  "manageEntity": {
    "action": "Save",
    "entityId": "159266",
    "entityType": "Track",
    "nonce": "0x70ae5e719b4678eae785a59142798fa1ae85db42d40eb0f82389be20b1976ef2",
    "signature": "0xb5ccebda8d19acd52b754872a1654624d161420354084e210c573af6ec6bf0aa1d1863b88ec520724ce89a2ff0b51e5a76b606fb0cd3d156aa101e3ef83fd0561c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}