{
  "manageEntity": {
    "action": "Save",
    "entityId": "873667497",
    "entityType": "Track",
    "nonce": "0x8fd4715368059f036f476c8da8645b143658f6f4e0a87c0ef0120b2b4448162d",
    "signature": "0x51082f7c825d9de3f2912ba6f5eedf8c27254189894d2b5fddcabf635a9779de2ed9a81dc62f54add961af751fe5d0b0fa5d422cf388af59f2f2741c4a1613d21b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}