{
  "manageEntity": {
    "action": "Save",
    "entityId": "142574",
    "entityType": "Track",
    "nonce": "0x0f3726af733c6c9b60fb627918e29b86af2e8063a1837a005be70b4cc420ebf1",
    "signature": "0xb9bc9dabf0e00cd554c6f87a9c6e5e816a6cd679314344ac7c62ed2d0c8cee2e253972ed0ae13346bda056951d3f170f084c9e6028c07fa0c3f460c229b706ed1b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}