{
  "manageEntity": {
    "action": "Save",
    "entityId": "1781836915",
    "entityType": "Track",
    "nonce": "0x2d14bd233e039187f657c253e727a29f88b0ac1f3da6b8c94120bd163a0ab9a0",
    "signature": "0x36e09f842e74af49615be9031e20eba4bf5717a626a44d449cf324de9e91dd4922073929795f54b1b5e4864fac95ac8b3c4acc50d485e2698c4ad69857ad0c581b",
    "signer": "0x9d71fCCB64e7575736E44460e714Ce0fcd69cf08",
    "userId": "16198441"
  }
}