{
  "manageEntity": {
    "action": "Save",
    "entityId": "1416876644",
    "entityType": "Track",
    "nonce": "0xb2ae24e2ae2c4c7168ad6b73e2a076a3b65566b552361ea4bc632784e16878e5",
    "signature": "0x8f85b1aa9421310f7f2f5b15679f794f0649ed73d77664519616044be60ea6e34aaa3c7ebb9b0b1c8e7467125122c83a752f52d8c99b7945492218da17b712f01c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}