{
  "manageEntity": {
    "action": "Save",
    "entityId": "169023063",
    "entityType": "Track",
    "nonce": "0x2f23ed612ff1a3248effa4edb2c2792a18689a54467878dcb8fe3df4843abafb",
    "signature": "0xd5a4077091b8d312ec29be5c0eb969b7cbe5def3898ae4dd1af961cd6f78dcf80c4a3bd44691d759ffb4b52c6a645091ef56fc89b5c629b0581b3c50383776871b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}