{
  "manageEntity": {
    "action": "Save",
    "entityId": "1841121681",
    "entityType": "Track",
    "nonce": "0x5e7597bfed160ca547fdb4d0020cc147ab62a6224a18db09478567c12e7eb0f9",
    "signature": "0xe84107615522db444ebf666b67b43bd218880a9c98ced25a1c79aa4f71420f046955e3d7b50fda5f48bbf429d953a0b09db60fec44ef7bc0014635789f818d0c1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}