{
  "manageEntity": {
    "action": "Save",
    "entityId": "1879619202",
    "entityType": "Track",
    "nonce": "0x875830ecd3ab7bc9e3e84e9c45c47eb6ef2db1d97ba4e2422893c7a3e1ecadb5",
    "signature": "0x3fcc8708648bb031d2f1289ab6fec2a3289ada6d837633e446e53caf45e17b31690227e27963a1d6295477b415e344df2fdce77e9cd479b555534c0694734a741b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}