{
  "manageEntity": {
    "action": "Save",
    "entityId": "1228769968",
    "entityType": "Track",
    "nonce": "0x3fbb2c0529a1adbbbeac3deea670b0e4c86f2dd7e7379aeb72e08ed2df894b50",
    "signature": "0xadead6d75c8757ef81f84eaaa2ed646ba8cc1a275815a8d0416ebb0d99d125062abb6602cd20184bbed2c14ffebdcc0ead87a39f211fff6dedbf4f27e6a7cc7b1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}