{
  "manageEntity": {
    "action": "Save",
    "entityId": "1220025469",
    "entityType": "Track",
    "nonce": "0x2386ec6bb4e2974d85af2f61bbec5e8f24cf78e2b0a453d5ec1a75624aaff182",
    "signature": "0xc8707b02ea883b3173e9a99afe3b51420dd5c5c4d574915591e41ca4a3ac2bc75d0e236c5a203e89790218644a4de36bfb76e6a76c632eaedc0076d70939f1be1c",
    "signer": "0x48c57b64a5a12Dc7C7742Fdb629EEce52FF5591D",
    "userId": "930634116"
  }
}