{
  "manageEntity": {
    "action": "Save",
    "entityId": "41070361",
    "entityType": "Track",
    "nonce": "0x5a99358fd1aea4fc2e7760a246ef2dda463b7e813e7b5db0cafdee89961ca030",
    "signature": "0x9fc687fa4f77c2b3e5cd901bb571eaaed177e00b841c0818c86eb898c57c755333696ff3d15e5f9b2d9a3b0f8f35c6227d654f70b19fc53446627fdec6b13be41b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}