{
  "manageEntity": {
    "action": "Save",
    "entityId": "1182573449",
    "entityType": "Track",
    "nonce": "0xa0a33c3c4ba486ee5a5f4caec89f7a069368d3940d1c122f1919b7435950f292",
    "signature": "0x9ed89a7f1148044b92f9f6dcf908bef600be512ead770c71fa20e07af7ebe5656e292f8306f2fbd626d5741eaaafaadef63e994e7854ad274c4fc735e3c203471c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}