{
  "manageEntity": {
    "action": "Save",
    "entityId": "761245",
    "entityType": "Track",
    "nonce": "0x93e4518af226a6593941257a37c7eb78f56454f4a6f06b4c666fe3916f2c79d8",
    "signature": "0xf9eca2089db065c0474535e5f652f875e3156210c2180d80c96f8d8ab13d43b61eabc42b0badecd9c9ed8e69486a9633b609f679b247ab3677b7c99feeec2f051c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}