{
  "manageEntity": {
    "action": "Save",
    "entityId": "207525",
    "entityType": "Track",
    "nonce": "0x352da53c3413729af34905982aca516f676f6aa0274ebc0e1982a6f42047970e",
    "signature": "0x850e914ce7218826a4a38c552da3b4e06c8d3bc38b86b683e4a1ab233eb77ad151a9e27b31a303d97d397a80e42816f3ec33f3d46ade31cd457adcc51a850a0f1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}