{
  "manageEntity": {
    "action": "Save",
    "entityId": "302332304",
    "entityType": "Track",
    "nonce": "0x5ddcae32d8c60414c797fb01b358708d6b341a3e59bdcd5fd9f2d9fdbc3d106f",
    "signature": "0xc41a195ba1c0d89fc7c211717079178e82ec22624f78852d9feaa454ae3b3ff93f15715cc4a453e5761c790a3eec80b5dd9e2381f6931cc8a9ff38afeb9f8f921b",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}