{
  "manageEntity": {
    "action": "Save",
    "entityId": "21740",
    "entityType": "Track",
    "nonce": "0x93ee91df3fdeab439b3210ef0cef3bd21293e9e3adfdbd9bf66fc35b6ca947f6",
    "signature": "0x20db66c21e9fc5c6be6c51a6cacff07ad55d1b031c3fafc5c026ff3ae7d79a6f5da367dd4c96ad67ba24ce97bb9e1b574b5bdbad5531e24ce19c7cbf702494fd1b",
    "signer": "0x036B1ee0d2003ae5B5E252d58647d13f0e588EEB",
    "userId": "161353174"
  }
}