{
  "manageEntity": {
    "action": "Save",
    "entityId": "1821798405",
    "entityType": "Track",
    "nonce": "0xf3439265e426336db565eb7f7afa2355bb5981b9a90dfa992a160ad489a218f4",
    "signature": "0xe089db2dfff6a104074d7ba3cf5ee1075df4276cec4ad7cb8e42c75071470c6c1d47c7d56a90e5dcb7a9d7523e866dc54fee9d1cb451dc4d5a5f9134021c27741b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}