{
  "manageEntity": {
    "action": "Save",
    "entityId": "386731978",
    "entityType": "Track",
    "nonce": "0xbd584b44876e244f467eeb231c95ccc8fccab1e566991d03ef9c3339aa6d0715",
    "signature": "0xf08779f75dd12a7541d909f6f139552cdcf5479a747f5a741eeee2fbec7dd6917071662a3a79ffabff6ec9f1f160adcc2f945d61cd51355714b5a5f562a7d7e61c",
    "signer": "0x0168976438910D2f5330323a0d0141Fb4Af95032",
    "userId": "317847"
  }
}