{
  "manageEntity": {
    "action": "Save",
    "entityId": "1855643869",
    "entityType": "Track",
    "nonce": "0xe8848025cf176b249da68ee5e5539ad43dd453851197f5cd5fd32cbb6101cba3",
    "signature": "0x4414c53dfab28889e2a81e9eba91a02ce9814116aef6feccb0cab648853c103e47cc72b61b35c6fdc330e0bd106378abd5ea92f13c038caa2f0422415a59295b1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}