{
  "manageEntity": {
    "action": "Save",
    "entityId": "4232",
    "entityType": "Track",
    "nonce": "1791489078872688681",
    "signature": "0x4f8d8cea9afd8e551f1bd6e2264df54de43a7129c6cd5ff9243ab9f776b7b0a4177f1b715df93085d36ab6c8e419e48fc571834d4e676e9363ca095db05e09c51b",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}