{
  "manageEntity": {
    "action": "Save",
    "entityId": "988656491",
    "entityType": "Track",
    "nonce": "0x0a6dd8cff85c31b9078caba5755950c4a93f5392034f05329b0606816e9a1de5",
    "signature": "0xb7d8c4c69fd624a1d49dbe0224261a5a37bedc615a65bd601feeaa8199822be900a989d0a2042572dcbd9410f11e87f7665c9710b7cf926ff177ea24846245681b",
    "signer": "0xB63c8A7B935b55823f383e8f19B6207FB6b31168",
    "userId": "330374208"
  }
}