{
  "manageEntity": {
    "action": "Save",
    "entityId": "1524981252",
    "entityType": "Track",
    "nonce": "0x2b18acff0776194a8daa1e59d2869e0118d262e49c63101d155761a471c00ae3",
    "signature": "0x70b485038380d5648dd35eeaef3b626b7e62216c8f9e52a3a72ac1e671f508d30174513c6d42403a5a0af7bf9fc64671f0821908d03cf2eece4e722044ae31c31c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}