{
  "manageEntity": {
    "action": "Save",
    "entityId": "915952294",
    "entityType": "Track",
    "nonce": "0x054e30b6bf5317ac1651ec02080bb5243de4c985657989d3ca50a11c3d98a057",
    "signature": "0xf822ad7285edd4475d6293d8715d65e643367439780d5744aed1a6f3a72e1d3033e9c55de7656c37245f42bd168b926e8be8192356918a0e912b9f997d02bfb51b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}