{
  "manageEntity": {
    "action": "Save",
    "entityId": "1057110",
    "entityType": "Track",
    "nonce": "0x08aa8257564b9ef20168b61f103ddfcf59b9b43a769b13849eaccc603aac4447",
    "signature": "0x1b7ea8900a0baf6c62487c8f5d4f36dc4bfcf2b8ba19ceb130e74d8d143e1ef9382b3f66b153e67eb02b745a69b79d547a21ddf1a4f61a691a48d6c6d85329661b",
    "signer": "0xdA0eFB0e7b973C487c12501759aDb23012CB5248",
    "userId": "178070"
  }
}