{
  "manageEntity": {
    "action": "Save",
    "entityId": "1025106770",
    "entityType": "Track",
    "nonce": "0x0367736eb2ca986501029296e15c0fb1bc759a5286524b60e97f2b0159e4527b",
    "signature": "0xf89deb9da24603f17b55a189471377919de77d99db27c25ec0d8c346fd5261270858c036227bc42d8bb48975b7556113f01ebc490367758a35faa3ae0d27ce861c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}