{
  "manageEntity": {
    "action": "Save",
    "entityId": "1633669256",
    "entityType": "Track",
    "nonce": "0x87697b2b2a0201c604c9fc285c429af76c7c791270f280945a61f2f340e6c370",
    "signature": "0x0b9f1e8a9fc86d3023f92fc51018eedfcb701d424770686846eea9e48adc71665553c43f6c292043551db4538171f10f88c2f09cb6ced4b277761c5ba8d90f941c",
    "signer": "0x473784A6Db124b95de277d9A2527561BA95e7133",
    "userId": "957849040"
  }
}