{
  "manageEntity": {
    "action": "Save",
    "entityId": "1819287271",
    "entityType": "Track",
    "nonce": "0xc41fe46b9ae2a71ea4d523e7d973a3494eb9b33909cb3d5f9690a2e8865cd5e2",
    "signature": "0x71e95e2591c3485e25ff7463ce468176aabd4e4e40ba7a9ee5c1a187ab59252308a09d94c63df68337b5e23683c1adb8fded44fd1dfef7e6e99fd40d5173bd0e1c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}