{
  "manageEntity": {
    "action": "Save",
    "entityId": "687791106",
    "entityType": "Track",
    "nonce": "0xece32696a313d4b6398448ec6142408ccbed6391a764fb8c3c5639b5bcbc9a56",
    "signature": "0x72fdbb2a06b93412dadb001eed2b9e9863758e718ee29e7c97f8c43943e18c094833d9ea5eb71f9d2b5af10218fafec4ed11b0e2409c1f80b0f2ff9db750f0421c",
    "signer": "0x036B1ee0d2003ae5B5E252d58647d13f0e588EEB",
    "userId": "161353174"
  }
}