{
  "manageEntity": {
    "action": "Save",
    "entityId": "548063354",
    "entityType": "Track",
    "nonce": "0x1b962d2e58718a77a1a2ca8333ccbf23c1c6cb7e4739bbaf07c6017d8c812bfc",
    "signature": "0x8931b80779b0eba3b507ed42b87ba92c7caaf31411084aa12cffc66960fe563f141cc80da0a5ec61cbf40fca9c3f7d143f3399943173992ed16fc0ba73849ef01b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}