{
  "manageEntity": {
    "action": "Save",
    "entityId": "1127607",
    "entityType": "Track",
    "nonce": "0x43c766ee393b461a2ebe52035f02a0922ac0a78966e8b1b1fd6602f94164a05f",
    "signature": "0xccee32e04df9679ea54686ff90c064e85a387e8b4a15b0c10281138b7d66c3a24c2f21f7f1d8ac9bc49e6cadb4087cd9442bbf362fa3def7cf2033c7967d4c2d1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}