{
  "manageEntity": {
    "action": "Save",
    "entityId": "2068512048",
    "entityType": "Track",
    "nonce": "0xf7c2755bf45ee178681b6d5395392d51a48350ae4dac000fb145292491986091",
    "signature": "0xa5d5bccd91d7a34d18efc97f0db2787ac518e8c60b360659234643bdff33a40f4ee02a1efa84811eb00990ae77b390201473f8091e29521253f59a7cdddafaaa1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}