{
  "manageEntity": {
    "action": "Save",
    "entityId": "201666183",
    "entityType": "Track",
    "nonce": "0xe9ae327363698657d8e3dce725b45c0196664aac6584b23fefea60e7f588f5f8",
    "signature": "0x57550e50c0a18b59752b35abd10430d99a9b638af78d1054b0f512a9b34be8fa563c5f629c6d3e19d5dce80a188e083fd603a3777a58f3c580852a3ddbbbc2231c",
    "signer": "0x9369ae91F6A1cC4996D9126FD991d64e7E24c805",
    "userId": "333763354"
  }
}