{
  "manageEntity": {
    "action": "Save",
    "entityId": "567339885",
    "entityType": "Track",
    "nonce": "0xbac6bc09a29ce8a446ac796ea800a0a91595fc88670b764dc2a4cecf7a16c507",
    "signature": "0xa322d8142637c3d0b1f6d035f99030fd8cab55e005e8937d4315329bccf8b4782b216f575f4f8318c109389a8417b13bdf7410cb6c4ba5ad4a91b4fb08bc98451b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}