{
  "manageEntity": {
    "action": "Save",
    "entityId": "254500314",
    "entityType": "Track",
    "nonce": "0x0a65bf37636bec43f588963040cd34d0a9a898238953c617b616ab373931e35e",
    "signature": "0xc5226bcd2f8c242280a09b04737861d371120bd3f0eea4e86eccb721cd0888f44d1a8f392a25aa912b630a4d4fb6e22a339274fa93683746275968d30f4cd0f71c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}