{
  "manageEntity": {
    "action": "Save",
    "entityId": "49853566",
    "entityType": "Track",
    "nonce": "0x563b53700f1d20f953bc0ad96c923529231b5c307cd7e1e4470b52fa8611f6cd",
    "signature": "0x5a73742b33bab5438ab4286cf403743ec72c3a859591606dafa24be138db822a6c5fb33b541d6903ac205eff4d27f3df59fd828be97bfe4537eda010486b550b1b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}