{
  "manageEntity": {
    "action": "Save",
    "entityId": "1834079238",
    "entityType": "Track",
    "nonce": "0x7e54d0f6d09148f285d7470a19cd8361e415e754d669968b62fcabc2a95caad2",
    "signature": "0x5f16e9ca0a8e2fb73b2713b6386e06de300e401c13d428c5b0dcf0af5d8357f74685b7d3dc9d61101c5b962a43f70fd08e36e621a1d9e2c25c7c48d88a75ab6b1b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}