{
  "manageEntity": {
    "action": "Save",
    "entityId": "428407",
    "entityType": "Track",
    "nonce": "0xbbe71172e35276e0f8875af1ab1f9c4617cb3efa5d7d8cdd0ca5d262571fe8ee",
    "signature": "0xd3e45c5741c70590c2753e1d88fc8056f13f9f01075d9365ee8f641173e6d6721363c61f8b0d1b5e42e992f844a93be97061a5f7c308e74fda6bef36927e1efb1b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}