{
  "manageEntity": {
    "action": "Save",
    "entityId": "1741634834",
    "entityType": "Track",
    "nonce": "0xbc6a1619baf969426b79f70675b3be3f4c1f59c67032e3f6e80cdf7533edf7e1",
    "signature": "0x86a32e0a7afa79268190dbb51b581d84b824fa9a905f47c0c709d91d6c7635c97467b2da4e539d1a65da25b82a08b51c2a6e057bd243faf1f2a9b11eb300f7c61c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}