{
  "manageEntity": {
    "action": "Save",
    "entityId": "1775170814",
    "entityType": "Track",
    "nonce": "0xaa9073db1d8c0845e967fa74c13e4299a852b50820f9687f5c48525eda473d92",
    "signature": "0xea2f356960d03d199761b65119a957c230d7b83e7d205bf1f4fe8354c3fd5f1d7e39915fc93d45236834da309970bfcc59719ae99fafb7f90b82c7021f8868001b",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}