{
  "manageEntity": {
    "action": "Save",
    "entityId": "682511",
    "entityType": "Track",
    "nonce": "0x5f8fd1112210a086fbaa65d1a0f878e29f10cb30ba6a9a35094596249d48efdc",
    "signature": "0x3f0feba2eed9f40b210c81a5046533096d603e131879b3f2c8d5228f2502a9ad764c2616cc90344fb0dfb917605d45996bc90e09e392ca356033461a7edf60741b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}