{
  "manageEntity": {
    "action": "Save",
    "entityId": "544055748",
    "entityType": "Track",
    "nonce": "0x20170157bcceccf01795883b0bbc1de03d884475b8aa85b885a722e80594d842",
    "signature": "0x27d6c99dee198a3ea2ad818d58a63bce1d6eb8852cf7d4fb3c2a27b24c077c8c3cb41b6900fe0abf6049ba3fcb8fccd344c43df0aef4cd4ecd12b7a996b4a74f1b",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}