{
  "manageEntity": {
    "action": "Save",
    "entityId": "576575",
    "entityType": "Track",
    "nonce": "0xb3406ea43e7898aa0868ccf24ab1bb13b41bafff1d1121dafd7a281b2f0b23a4",
    "signature": "0x84518ef61bf1498309a1d484490105abe5db65987c7d8e5b8647525a10a40c7351d85e50d3911b4b802b849cb9867de3cd5027238ffcb5a7870a2dc4df144ff41b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}