{
  "manageEntity": {
    "action": "Save",
    "entityId": "1102071",
    "entityType": "Track",
    "nonce": "0xd692d7f488cd8d8dc5b94623bb529b1abcf735b4f203864e5003a877368bb45d",
    "signature": "0xaaf364175e6901ff290987c3e325d33a98de3de20d18656c4925733bba305d7348651bfc4670524d491af744a8e6236149457900c6b6d3026f3849c9401b34a21c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}