{
  "manageEntity": {
    "action": "Save",
    "entityId": "103398",
    "entityType": "Track",
    "nonce": "0x6157aa9db7b89ade35d777acb32b38c206624dc6683cd3a46089229bbe194d42",
    "signature": "0xf0ecf287a4a3fee3ad042bead77a85c382dfd58f856dced4b1b86ff7bbc55e6e47bab272197075e301d5157711b1772ccc5ba699883ae7c7396a0f75149bd2af1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}