{
  "manageEntity": {
    "action": "Save",
    "entityId": "717374928",
    "entityType": "Track",
    "nonce": "0xa1bec0747151c60e7793f96b05c95e7733b9a8a3e9b15b1f79b024879d07591d",
    "signature": "0xdeddc8cc071795573f7543dee4816fe8f18f8c07cdbaaa424bc8056ca8defbff082374f49e74d6a5d70ce5fde1a7200fb49880cb32bea0351e66a779bb13c2d11b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}