{
  "manageEntity": {
    "action": "Save",
    "entityId": "1077741",
    "entityType": "Track",
    "nonce": "0x3269f4757fa59c37d90245388ccea284c00f908571d5d898d4609d3c20466a80",
    "signature": "0xb8ae4bf20ffdd4e8b017338dc405dfc02874a3ae7dfc1aee9d890b2f0ee1f8af5ffa601e5329e30c0d1b5fff243c6391f2e1b0e9bec44323c769335ca5cbbf611c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}