{
  "manageEntity": {
    "action": "Save",
    "entityId": "1361931822",
    "entityType": "Track",
    "nonce": "0x82e32dcddf4d99da70ded17a8b85800b296ed999a6dc905f200325b6be0de16c",
    "signature": "0xf930888c9a78ca5a97b2eb2ea9c549653d4708dee78b2e9cf40fe89ebfe4f7ab5300b24b9c7063831f4f974c1b8dba45037b017056915c1364d3029757e941bb1c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}