{
  "manageEntity": {
    "action": "Save",
    "entityId": "39821480",
    "entityType": "Track",
    "nonce": "0x9dd1aa624817ad72d6710641a517d5155e3c956aeb3071d7d95877b3578856f4",
    "signature": "0xfe5b2f62da8a8e44b84935c34ffb8536450c4e067267fc49710fa3ecc7ed92396542f71c335ca14379119fdb0806a620ccaf6cfc94392eb7de6bc43ac82d751a1b",
    "signer": "0xa185Ff45de6FF68eAa1d7ceC338cba250810134c",
    "userId": "54166466"
  }
}