{
  "manageEntity": {
    "action": "Save",
    "entityId": "1659617864",
    "entityType": "Track",
    "nonce": "0xdaaa87bd36c0517c21c3b8d09d3d2927a9d2fc00c1924aa6b26abb7922219197",
    "signature": "0x223763f393099d218562ed2c50907b865e920e2d78d1f935df9e6969c88e5d6b7459fbec46d1f787a4b07e6efd1be1a52b20eaeb95b1b43a87d3dc2b990568141b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}