{
  "manageEntity": {
    "action": "Save",
    "entityId": "1181577441",
    "entityType": "Track",
    "nonce": "0xb15f85165c44dd38c5d7303c774244705a98a637aa8aa5c225fbfb63d709ca46",
    "signature": "0x017632c4b7e267e7017b6cd32483e7e7d80edf99dc3e255f8ab41ad87deafac1121f4f02d57f5fb7948e20c58adda5062cb6e1cd9ddc4ab4cd97610a8db714991c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}