{
  "manageEntity": {
    "action": "Save",
    "entityId": "1364593483",
    "entityType": "Track",
    "nonce": "0x4ce3e3ccb2f8f5792e8c65aecaa2b5a7b49c9f912475f8cd4770035a48b6f7d2",
    "signature": "0xf01b78814cd3f35b3390588aeb9c902989cd77e0ee8b2a48de83f721f1dc936027f7f3357107846103cebba47facd868410bd7f9f85ed10092cf315cb9d045541b",
    "signer": "0x37C656432bDD87630C13F60036e9857B5ee36154",
    "userId": "288167767"
  }
}