{
  "manageEntity": {
    "action": "Save",
    "entityId": "1208679650",
    "entityType": "Track",
    "nonce": "0xb55aa09641f7ce451beaa968c087fb126e803d9f63f9a581c0bccbb355115cb6",
    "signature": "0x0b603bbd9775a1c16317b2413464326d5dc546230bae4013eb47af8a3681038c7895f43555bc9b36092e7fe7d8a47c6d34a5f6da4ee79bd99c32e0c3b785bb991b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}