{
  "manageEntity": {
    "action": "Save",
    "entityId": "505434706",
    "entityType": "Track",
    "nonce": "0x71f5791e1d5e82a25d22ffa8a4e2c8ecf581ec0f050d74257485d90dd33cfbd6",
    "signature": "0x7ddb60681ba071df586ddb26a49c2e3e9d4a7dd2addc1670f77f3291c24d69031ccebfad0c654615b7be8e6db06ae73beb6c417890535b31c2d180becffe5af41c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}