{
  "manageEntity": {
    "action": "Save",
    "entityId": "734212291",
    "entityType": "Track",
    "nonce": "0x57cb8398d08d319c4c44d45bf6fba489b8bf8fe6882ad58b50bbec41f3266cdd",
    "signature": "0x6fd6daf96d960a74a3241e854a2f6ad981c77217279644338da4b022a9e23dce02dacb9ae50fa58dfd73d45a1353c13af6fd8b231712517226147cc239dbd9801c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}