{
  "manageEntity": {
    "action": "Save",
    "entityId": "1210294049",
    "entityType": "Track",
    "nonce": "0xe947eee7aa1b288c53b77cfddbd70aface50236e1839593ccddc1a3db07a55fd",
    "signature": "0x29ea10eddd94ea284a8d24dbe76554c3117a9fcd97cb422b56645a6eebea85d35062a9322748350662c98963b197662dfcd956815805778c24bd4489018829831c",
    "signer": "0x354f479338B7F1593E5Ed2Bdb91a09c4bD12996C",
    "userId": "381478870"
  }
}