{
  "manageEntity": {
    "action": "Save",
    "entityId": "626739725",
    "entityType": "Track",
    "nonce": "0x8bc0ad91bc2fba939b67cb7edbf0fcf38e2cf6421e36ced91536e2f52ab9293d",
    "signature": "0x1891c0fd3dec5c4ed2ed9b09e36a6db7c4cf316414754e154c3e652700300a5f3b5b04860287f25acce6598c536c58c54efc7efa84f04c5cb7d7c5c1b2998f831c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}