{
  "manageEntity": {
    "action": "Save",
    "entityId": "647847354",
    "entityType": "Track",
    "nonce": "0x3f341ace4d34edf5e9ca0f0067985714ac2a76c6bf852404329d4f4281cb39a3",
    "signature": "0x1bde510658cc10b1e2a62339b5675d88c70738842de0a571abb345e5ea1b2fd1432551fb95375b8d43455c321bd2492249cd6761f71586001855ca5f9bb35d421c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}