{
  "manageEntity": {
    "action": "Save",
    "entityId": "1287355467",
    "entityType": "Track",
    "nonce": "0x3d6cf89e03fc1f43602109b40ab9972e0e3e9377889e86b5e0ca7e152efe8dcd",
    "signature": "0x2952d21167053a6383187e1cd17430f0cca7d4e4226ebde36a30d2e596dd39e43b8df40de75a6dbc511df6e404335ce9b99bcaa3e2d61ef1fef7d695331b90c71b",
    "signer": "0xB2A34b43465721B690e6CbCfB42C0cdC30050183",
    "userId": "103086"
  }
}