{
  "manageEntity": {
    "action": "Save",
    "entityId": "1841121681",
    "entityType": "Track",
    "nonce": "0xf0dc0ac1d3788d40c700d8feb8b16581abd804ef53b5a91377e9afa84866a236",
    "signature": "0x34f2ce167d0ba283af9033380b478a4f87b8eb2ffbba3f074a4e961b80bf54fb65f077d99322e4e32daadcf7e47ab7735d1200cce41b8c9cfc4e231e0e6cf6fb1c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}