{
  "manageEntity": {
    "action": "Save",
    "entityId": "123392",
    "entityType": "Track",
    "nonce": "0x08cd5d88d971fa987df2cfd5782ff2175cbcc4cba7fa5d67748bebb3d4c3383b",
    "signature": "0x4c91439101ded439f8e5935959b37856ea157bb965d4a285801d853e06dc99f9348ee3f41bc9ec6ef1b2cd34013c92fbea5ec238ded407dcf4ea71bae41dfb5a1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}