{
  "manageEntity": {
    "action": "Save",
    "entityId": "183545",
    "entityType": "Track",
    "nonce": "0x43500f0aa4dc08b0a5da84795ccfe08fce83b5f414e8655b91da26255806a621",
    "signature": "0x7a3e43ad34a3656fc05de313ff40cce69e13da019d24a350f98648329e52fd78184229649359d4b96a681918e6656f980b54d3ae543f0e1eb39d3ddef13afed31c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}