{
  "manageEntity": {
    "action": "Save",
    "entityId": "1341598365",
    "entityType": "Track",
    "nonce": "0x7e72a58a72352eedf617fd2f0d22193cf9904cd796a72bc062d9bb0d0ba42aef",
    "signature": "0x2b7e0cb90dbf14b308613b3511be7c3189e6f959912dc51b8922d10fff03d3da34f210510a06010c3b2ba832d2edfe458eaf4ca371700c5e237dfc46473e3d1c1b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}