{
  "manageEntity": {
    "action": "Save",
    "entityId": "1137127752",
    "entityType": "Track",
    "nonce": "0xbf5ca02a6fb0028e51a55c27bbcd22f81b7cdc9f2a09a91c00f9d6e20970539f",
    "signature": "0x95975e5eaeb35c7ee613b53bbd40739c6c8ad7a0fac0a4f0466fb8ca7c96fee1626dfcbc879761e747749854dbe50251f48eb0a9652a9879994376c45b568d591c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}