{
  "manageEntity": {
    "action": "Save",
    "entityId": "126690",
    "entityType": "Track",
    "nonce": "0x3860aa3107a89dd2245c8b49d66b520345bb434f51e1a264e8a035b6beb9e35a",
    "signature": "0xe05799a080c239af460edf1da2e29c322c2dfd5125c74c457b5b30b8bf23009530909bebcfbaf1068ead208bbc93e0e97f4d337cc4e13652965c16c27e1f82ed1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}