{
  "manageEntity": {
    "action": "Save",
    "entityId": "1596792343",
    "entityType": "Track",
    "nonce": "0x83343922f95557c47ec5846091376306104321247aa4f6803e7f23d7961301ab",
    "signature": "0xafe4c202dda22941f19b978be7c02b7c41cebf1dab4f80a8179e2c26b30c752e693d2d410664b5bb9723750dafef64b8fd13ac850fdf49008b441ae2baea7b891c",
    "signer": "0x736bA8382Ff1e5c66268EF8028c17783435BAFD5",
    "userId": "248414574"
  }
}